High-efficiency superconducting nanowire single-photon detectors\n fabricated from MoSi thin-films

Abstract

We demonstrate high-efficiency superconducting nanowire single-photon\ndetectors (SNSPDs) fabricated from MoSi thin-films. We measure a maximum system\ndetection efficiency (SDE) of 87 +- 0.5 % at 1542 nm at a temperature of 0.7 K,\nwith a jitter of 76 ps, maximum count rate approaching 10 MHz, and polarization\ndependence as low as 3.4 +- 0.7 % The SDE curves show saturation of the\ninternal efficiency similar to WSi-based SNSPDs at temperatures as high as 2.3\nK. We show that at similar cryogenic temperatures, MoSi SNSPDs achieve\nefficiencies comparable to WSi-based SNSPDs with nearly a factor of two\nreduction in jitter.\n